Green Living

Why are there cracks between the framing and foundation of my house?
Answered by Planet Green
  • Planet Green

    Planet Green

  1. Most homes have wooden framing that sits directly on top of a concrete foundation. In most homes built before 1980, the "mud sill" (the lowest section of wood) rests directly on the concrete. The surface of the top of the foundation wall is uneven, so there are often gaps between the wood and the concrete where wind can enter. This is one of the worst leak offenders in older homes, but you can seal it easily with spray foam or caulk. In newer homes, foam material fills the gap between the top of the foundation wall and the mud sill. You might want to check it anyway, just to be sure the seal was put on correctly, and to add some foam or caulk if necessary.

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